Method one

apps/knowledge/serializers/problem.py:164–167

(self, with_valid=True)

                    os.path.join(PROJECT_DIR, "apps", "knowledge", 'sql', 'list_paragraph.sql')))

        def one(self, with_valid=True):
            if with_valid:
                self.is_valid(raise_exception=True)
            return ProblemInstanceSerializer(QuerySet(Problem).get(**{'id': self.data.get('problem_id')})).data

        @transaction.atomic
        def delete(self, with_valid=True):